参数资料
型号: MAX797CSE+T
厂商: Maxim Integrated Products
文件页数: 7/32页
文件大小: 0K
描述: IC REG CTRLR BUCK PWM CM 16-SOIC
产品培训模块: Lead (SnPb) Finish for COTS
Obsolescence Mitigation Program
标准包装: 2,500
PWM 型: 电流模式,混合
输出数: 1
频率 - 最大: 330kHz
占空比: 96%
电源电压: 4.5 V ~ 30 V
降压:
升压:
回扫:
反相:
倍增器:
除法器:
Cuk:
隔离:
工作温度: 0°C ~ 70°C
封装/外壳: 16-SOIC(0.154",3.90mm 宽)
包装: 带卷 (TR)
Step-Down Controllers with
Synchronous Rectifier for CPU Power
____________________________Typical Operating Characteristics (continued)
(T A = +25°C, unless otherwise noted.)
16m
QUIESCENT SUPPLY CURRENT
vs. SUPPLY VOLTAGE,
5V/3A CIRCUIT IN IDLE MODE
1400
QUIESCENT SUPPLY CURRENT
vs. SUPPLY VOLTAGE,
3.3V/3A CIRCUIT IN IDLE MODE
30
QUIESCENT SUPPLY CURRENT
vs. SUPPLY VOLTAGE, LOW-NOISE MODE
15m
1200
14m
800 μ
STANDARD MAX797 APPLICATION
CONFIGURED FOR 5V
SKIP = LOW
SYNC = REF
1000
800
SWITCHING
20
f = 300kHz
f = 150kHz
600 μ
400 μ
600
400
NOT SWITCHING
(FB FORCED TO 3.5V)
STANDARD MAX797 3.3V/3A
10
STANDARD MAX797 3.3V/3A
200 μ
0
0
4
8 12 16 20 24
SUPPLY VOLTAGE (V)
28
32
200
0
0
4
CIRCUIT, FIGURE 1
SKIP = LOW
SYNC = REF
8 12 16 20 24
SUPPLY VOLTAGE (V)
28
32
0
0
4
CIRCUIT, FIGURE 1
SKIP = HIGH
8 12 16 20 24
SUPPLY VOLTAGE (V)
28
32
1.6
SHUTDOWN SUPPLY CURRENT
vs. SUPPLY VOLTAGE
800
DROPOUT VOLTAGE
vs. LOAD CURRENT
20
REF LOAD-REGULATION ERROR
vs. LOAD CURRENT
1.4
700
1.2
600
f = 300kHz
15
500
1.0
0.8
400
10
0.6
DEVIC E CURRENT ONLY
SHDN = LOW
300
f = 150kHz
0.4
0.2
0
0
4
8 12 16 20 24
SUPPLY VOLTAGE (V)
28
32
200
100
0
0.01
STANDARD MAX797 APPLICATION
CONFIGURED FOR 5V
V OUT > 4.8V
0.1 1 10
LOAD CURRENT (A)
5
0
1
10 100
REF LOAD CURRENT ( μ A)
1000
MAX796
VL LOAD-REGULATION ERROR
vs. LOAD CURRENT
SWITCHING FREQUENCY
vs. LOAD CURRENT
MAXIMUM SECONDARY CURRENT
vs. SUPPLY VOLTAGE, 5V/15V CIRCUIT
500
400
300
200
100
1000
100
10
1
SYN C = REF (300kHz)
SKIP = LOW
+5V, V IN = 7.5V
+5V, V IN = 30V
+3.3V, V IN = 7.5V
450
400
350
300
250
200
150
100
50
I OUT (MAIN) = 0A
I OUT (MAIN) = 3A
CIRCUIT OF FIGURE 11
TRANSFORMER = TTI5870
V SEC > 12.75V
0
0
20
40
60
80
0.1
100 μ
1m
10m
100m
1
0
0
4
8
12
16
20
24
28
32
VL LOAD CURRENT (mA)
LOAD CURRENT (A)
SUPPLY VOLTAGE (V)
_______________________________________________________________________________________
7
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